| Cory Abbott | 28 | P | 6-2 | 217 | R | R | 1995-09-20 | San Diego,CA | MLB | 2021-2023 | 2015-2025 | 2017- 2- 67-CHN | Tacoma Rainiers (AAA) |
| Ty Adcock | 27 | p | 6-0 | 213 | R | R | 1997-02-07 | Oxford,NC | MLB | 2023-2025 | 2017-2025 | 2019- 8- 246-SEA | Tacoma Rainiers (AAA) |
| Starlin Aguilar | 20 | 3B | 5-11 | 170 | L | R | 2004-01-26 | Azua,DR | A | | 2021-2025 | 2021- UDFA -SEA | ACL Mariners (Rk) |
| Kelvin Alcantara | 18 | OF | 6-0 | 165 | L | L | 2005-09-15 | Santiago,DR | Rk | | 2023-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| Raul Alcantara | 23 | P | 6-0 | 167 | L | L | 2001-01-22 | Santo Domingo,DR | AAA | | 2019-2025 | 2017- UDFA -SEA | Arkansas Travelers (AA) |
| Peyton Alford | 26 | P | 6-0 | 190 | L | L | 1997-08-15 | Florence,KY | AA | | 2017-2025 | 2021- UDFA -SEA | Arkansas Travelers (AA) |
| Jake Anchia | 27 | C | 5-11 | 210 | R | R | 1997-03-05 | Miami,FL | AAA | | 2016-2025 | 2018- 7- 208-SEA | Arkansas Travelers (AA) |
| Brian Anderson | 31 | 3B-RF | 6-2 | 215 | R | R | 1993-05-19 | Edmond,OK | MLB | 2017-2024 | 2012-2024 | 2014- 3- 76-MIA | Tacoma Rainiers (AAA) |
| Cristian Aray | 17 | P | 5-10 | 155 | R | R | 2007-04-05 | San Tome,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Randy Arozarena | 29 | LF | 5-10 | 185 | R | R | 1995-02-28 | Havana,CU | MLB | 2019-2025 | 2016-2025 | 2016- UDFA -SLN | Seattle Mariners (MLB) |
| Gregori Arrieche | 22 | P | 6-2 | 205 | R | R | 2001-12-19 | Carora,VZ | Rk | | 2024-2024 | | Dominican Mariners (Rk) |
| Michael Arroyo | 19 | 2B | 5-10 | 160 | R | R | 2004-11-03 | Cartagena,CB | AA | | 2022-2025 | 2022- UDFA -SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Manuel Baez | 19 | C | 5-9 | 192 | R | R | 2005-05-22 | Santo Domingo,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Luke Barker | 32 | P | 6-3 | 230 | R | R | 1992-03-11 | Chico,CA | MLB | 2022-2022 | 2013-2024 | 2016- UDFA -MIL | Tacoma Rainiers (AAA) |
| Freuddy Batista | 24 | C | 6-0 | 225 | R | R | 1999-12-12 | Santo Domingo,DR | AA | | 2017-2025 | 2017- UDFA -SEA | Everett AquaSox (A+) |
| Mike Baumann | 28 | P | 6-4 | 240 | R | R | 1995-09-10 | Mahtomedi,MN | MLB | 2021-2024 | 2015-2025 | 2017- 3- 98-BAL | Seattle Mariners (MLB) |
| Jarod Bayless | 27 | P | 6-4 | 225 | R | R | 1996-12-29 | Texarkana,TX | AAA | | 2018-2025 | 2019- 33- 996-SEA | Arkansas Travelers (AA) |
| Eduard Bazardo | 28 | P | 6-0 | 190 | R | R | 1995-09-01 | Maracay,VZ | MLB | 2021-2025 | 2015-2025 | 2014- UDFA -BOS | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Charlie Beilenson | 24 | P | 6-0 | 215 | R | R | 1999-12-10 | Los Angeles,CA | AA | | 2019-2025 | 2024- 5- 154-SEA | Modesto Nuts (A) |
| Jarrod Belbin | 24 | 1B | 6-2 | 220 | L | R | 2000-06-22 | Melbourne,AU | A | | 2019-2025 | | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Yensy Bello | 21 | P | 5-10 | 180 | R | L | 2002-12-02 | Santo Domingo,DR | A | | 2022-2025 | | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Gustavo Beltran | 19 | SS | 5-8 | 145 | R | R | 2005-05-17 | Lecheria,VZ | Rk | | 2023-2024 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Ryan Bliss | 24 | 2B-SS | 5-7 | 165 | R | R | 1999-12-13 | Burbank,CA | MLB | 2024-2025 | 2019-2025 | 2021- 2- 42-ARI | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Gage Boehm | 22 | P | 6-5 | 255 | R | R | 2001-11-21 | Austin,TX | A | | 2022-2025 | | Modesto Nuts (A) |
| Luis Bolivar | 20 | LF | 6-1 | 160 | R | R | 2004-02-09 | Turmero,VZ | Rk | | 2021-2024 | 2021- UDFA -SEA | Dominican Mariners (Rk) |
| Cody Bolton | 26 | P | 6-2 | 210 | R | R | 1998-06-19 | Richmond,VA | MLB | 2023-2025 | 2017-2025 | 2017- 6- 178-PIT | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Matt Bowman | 33 | P | 6-0 | 185 | R | R | 1991-05-31 | Chevy Chase,MD | MLB | 2016-2025 | 2010-2025 | 2012- 13- 410-NYN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Chandler Brierley | 26 | P | 6-8 | 220 | L | L | 1998-05-12 | Ridgewood,NJ | A | | 2017-2024 | 2023- UDFA -KCA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Juan Burgos | 24 | P | 6-0 | 185 | R | R | 1999-12-22 | Santiago,DR | MLB | 2025-2025 | 2019-2025 | 2019- UDFA -SEA | Everett AquaSox (A+) |
| Ty Buttrey | 31 | P | 6-6 | 240 | L | R | 1993-03-31 | Matthews,NC | MLB | 2018-2020 | 2012-2024 | 2012- 4- 151-BOS | Tacoma Rainiers (AAA) |
| Jose Caguana | 22 | C | 5-10 | 175 | R | R | 2002-04-05 | Puerto La Cruz,VZ | AA | | 2019-2025 | 2018- UDFA -SEA | Arkansas Travelers (AA) ... Modesto Nuts (A) ... ACL Mariners (Rk) |
| Caleb Cali | 23 | 3B | 6-3 | 230 | R | R | 2000-08-20 | Milwaukee,WI | AA | | 2022-2025 | 2023- 16- 487-SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Dominic Canzone | 26 | RF-LF | 6-0 | 190 | L | R | 1997-08-16 | Cleveland,OH | MLB | 2023-2025 | 2017-2025 | 2019- 8- 242-ARI | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Kristian Cardozo | 21 | P | 6-2 | 175 | R | R | 2002-11-10 | Maracay,VZ | Rk | | 2021-2024 | 2019- UDFA -SEA | ACL Mariners (Rk) |
| Josh Caron | 20 | C | 5-11 | 215 | R | R | 2003-08-03 | Eau Claire,WI | A+ | | 2022-2025 | 2024- 4- 121-SEA | Modesto Nuts (A) |
| Blas Castano | 25 | P | 5-10 | 162 | R | R | 1998-09-08 | Espaillat,DR | MLB | 2025-2025 | 2018-2025 | 2018- UDFA -NYA | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) |
| Deuri Castillo | 20 | CF-2B | 5-10 | 170 | L | R | 2004-06-18 | San Pedro De Macoris,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Luis Castillo | 31 | P | 6-2 | 200 | R | R | 1992-12-12 | Bani,DR | MLB | 2017-2025 | 2012-2025 | 2012- UDFA -SFN | Seattle Mariners (MLB) |
| Juan Cazarez | 18 | P | 5-11 | 172 | R | R | 2005-09-05 | Ahome,MX | Rk | | 2023-2025 | | Dominican Mariners (Rk) |
| Felnin Celesten | 18 | SS | 6-1 | 175 | B | R | 2005-09-15 | Guaymate,DR | A+ | | 2024-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| JT Chargois | 33 | P | 6-3 | 200 | B | R | 1990-12-03 | Sulphur,LA | MLB | 2016-2024 | 2010-2025 | 2012- 2- 72-MIN | Seattle Mariners (MLB) |
| Connor Charping | 25 | C | 5-10 | 210 | R | R | 1999-04-12 | Dearborn,MI | AA | | 2018-2025 | 2022- UDFA -SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Michael Chavis | 28 | 2B-3B | 5-10 | 190 | R | R | 1995-08-11 | Atlanta,GA | MLB | 2019-2023 | 2014-2025 | 2014- 1- 26-BOS | Tacoma Rainiers (AAA) |
| Jonatan Clase | 22 | CF | 5-10 | 150 | B | R | 2002-05-23 | Santo Domingo,DR | MLB | 2024-2025 | 2019-2025 | 2018- UDFA -SEA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Tyler Cleveland | 24 | P | 6-3 | 185 | L | R | 1999-09-09 | Little Rock,AR | AA | | 2020-2025 | 2022- 14- 426-SEA | Everett AquaSox (A+) ... ACL Mariners (Rk) |
| Ricardo Cova | 20 | LF-2B | 5-9 | 145 | R | R | 2004-05-24 | Puerto La Cruz,VZ | A | | 2021-2025 | 2021- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Hunter Cranton | 23 | P | 6-3 | 215 | R | R | 2000-10-24 | Santa Ana,CA | A+ | | 2021-2025 | 2024- 3- 91-SEA | Modesto Nuts (A) |
| J.P. Crawford | 29 | SS | 6-0 | 202 | L | R | 1995-01-11 | Long Beach,CA | MLB | 2017-2025 | 2013-2025 | 2013- 1- 16-PHI | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Dustin Crenshaw | 22 | SS | 6-2 | 190 | L | R | 2001-11-12 | St. Petersburg,FL | A | | 2021-2025 | | ACL Mariners (Rk) |
| Juan Cruz | 20 | LF-CF | 5-11 | 140 | R | R | 2004-04-30 | Villa Mella,DR | Rk | | 2021-2025 | | ACL Mariners (Rk) |
| Ty Cummings | 22 | UT-P | 6-2 | 190 | R | R | 2001-11-01 | Clayton,NC | AAA | | 2021-2025 | 2023- 7- 217-SEA | Everett AquaSox (A+) |
| Luis Curvelo | 23 | P | 6-1 | 170 | R | R | 2000-10-21 | Higuerote,VZ | MLB | 2025-2025 | 2018-2025 | 2018- UDFA -SEA | Arkansas Travelers (AA) |
| Elijah Dale | 23 | P | 5-11 | 175 | B | R | 2001-01-07 | St. Louis,MO | A+ | | 2021-2025 | 2023- 13- 397-SEA | Modesto Nuts (A) |
| Garrett Davila | 27 | P | 6-2 | 180 | L | L | 1997-01-17 | Belmont,NC | AAA | | 2016-2025 | 2015- 4- 129-KCA | Arkansas Travelers (AA) |
| Nick Davila | 25 | P | 6-3 | 230 | R | R | 1998-11-21 | Hialeah,FL | AAA | | 2018-2025 | 2019- UDFA -DET | Everett AquaSox (A+) |
| Colin Davis | 25 | LF | 6-0 | 215 | R | R | 1999-02-08 | Roswell,GA | AAA | | 2018-2025 | 2021- 7- 204-SEA | Everett AquaSox (A+) |
| Ernie Day | 22 | P | 6-4 | 230 | R | R | 2001-10-24 | Chicago,IL | A | | 2021-2025 | 2023- 14- 427-SEA | Modesto Nuts (A) |
| Sebastian De Andrade | 18 | C | 5-9 | 165 | R | R | 2006-05-11 | Valencia,VZ | Rk | | 2023-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| Manuel De Cesare | 17 | RF | 6-4 | 185 | R | R | 2007-05-08 | Estado Sucre,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Brett de Geus | 26 | P | 6-2 | 215 | R | R | 1997-11-04 | Pleasanton,CA | MLB | 2021-2025 | 2017-2025 | 2017- 33-1000-LAN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Alisson Del Orbe | 22 | 3B-2B | 6-3 | 185 | B | R | 2001-09-06 | Pimentel,DR | Rk | | 2019-2024 | 2018- UDFA -TEX | Dominican Mariners (Rk) |
| Chris Devenski | 33 | P | 6-3 | 211 | R | R | 1990-11-13 | Cerritos,CA | MLB | 2016-2025 | 2011-2025 | 2011- 25- 771-CHA | Tacoma Rainiers (AAA) |
| Gleiner Diaz | 20 | P | 6-0 | 170 | R | R | 2003-09-20 | Caracas,VZ | A+ | | 2021-2025 | | Everett AquaSox (A+) ... ACL Mariners (Rk) |
| Jhonathan Diaz | 27 | P | 6-0 | 170 | L | L | 1996-09-13 | Valencia,VZ | MLB | 2021-2025 | 2014-2025 | 2013- UDFA -BOS | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Anthony Donofrio | 24 | RF | 6-3 | 195 | L | R | 2000-06-28 | Massapequa,NY | A+ | | 2019-2025 | 2024- 10- 303-SEA | Modesto Nuts (A) |
| Carter Dorighi | 21 | IF | 6-0 | 190 | L | R | 2003-06-11 | Denver,CO | A+ | | 2022-2025 | | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Ty Duvall | 26 | C | 5-9 | 200 | L | R | 1997-07-11 | Cincinnati,OH | A+ | | 2017-2024 | 2019- 25- 764-OAK | Everett AquaSox (A+) |
| Brandon Eike | 22 | 3B | 6-0 | 220 | R | R | 2001-10-01 | Henrico,VA | A+ | | 2021-2025 | 2024- 13- 393-SEA | Modesto Nuts (A) |
| Duke Ellis | 26 | CF-LF | 6-2 | 180 | L | L | 1998-01-16 | Nacogdoches,TX | MLB | 2024-2024 | 2017-2025 | 2020- UDFA -CHA | Tacoma Rainiers (AAA) |
| Colt Emerson | 18 | SS-3B | 6-0 | 195 | L | R | 2005-07-20 | Zanesville,OH | AAA | | 2023-2025 | 2023- 1- 22-SEA | Everett AquaSox (A+) ... Modesto Nuts (A) ... ACL Mariners (Rk) |
| Logan Evans | 23 | P | 6-4 | 215 | R | R | 2001-06-05 | Ann Arbor,MI | MLB | 2025-2025 | 2020-2025 | 2023- 12- 367-SEA | Arkansas Travelers (AA) |
| German Fajardo | 23 | P | 5-11 | 180 | R | R | 2001-01-29 | Nogales,AZ | A | | 2021-2025 | | Modesto Nuts (A) |
| Jonny Farmelo | 19 | OF | 6-2 | 205 | L | R | 2004-09-09 | Centreville,VA | A+ | | 2024-2025 | 2023- 1- 29-SEA | Modesto Nuts (A) |
| George Feliz | 21 | CF-LF | 5-10 | 160 | R | R | 2002-09-21 | Neiba,DR | A | | 2021-2025 | 2019- UDFA -SEA | ACL Mariners (Rk) |
| Hunter Fitz-Gerald | 23 | 3B | 6-5 | 230 | L | R | 2000-12-09 | Boca Raton,FL | AA | | 2020-2025 | 2019- 33- 999-COL | Everett AquaSox (A+) |
| Josh Fleming | 28 | P | 6-2 | 220 | L | L | 1996-05-18 | Bridgeton,MO | MLB | 2020-2024 | 2017-2025 | 2017- 5- 139-TBA | Tacoma Rainiers (AAA) |
| Harry Ford | 21 | C | 5-10 | 200 | R | R | 2003-02-21 | Atlanta,GA | MLB | 2025-2025 | 2021-2025 | 2021- 1- 12-SEA | Arkansas Travelers (AA) |
| Walter Ford | 19 | P | 6-3 | 198 | R | R | 2004-12-28 | Pensacola,FL | A | | 2023-2025 | 2022- 2- 74-SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Ty France | 29 | 1B | 5-11 | 215 | R | R | 1994-07-13 | Downey,CA | MLB | 2019-2025 | 2013-2025 | 2015- 34-1017-SDN | Seattle Mariners (MLB) |
| Joshua Francis | 17 | 3B-CF | 5-11 | 155 | B | R | 2006-11-20 | Puerto La Cruz,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Alexander Garcia | 18 | SS | 5-10 | 155 | R | R | 2005-10-30 | Maracay,VZ | Rk | | 2023-2024 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Brandyn Garcia | 24 | P | 6-4 | 235 | L | L | 2000-05-27 | Newport,RI | MLB | 2025-2025 | 2020-2025 | 2023- 11- 337-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Yimi Garcia | 33 | P | 6-1 | 230 | R | R | 1990-08-18 | Moca,DR | MLB | 2014-2025 | 2010-2025 | 2009- UDFA -LAN | Seattle Mariners (MLB) |
| Yunior Garcia | 22 | RF-LF | 6-0 | 198 | R | R | 2001-07-29 | Bani,DR | A+ | | 2018-2024 | | ACL Mariners (Rk) |
| Mitch Garver | 33 | DH-C | 6-1 | 220 | R | R | 1991-01-15 | Albuquerque,NM | MLB | 2017-2025 | 2010-2025 | 2013- 9- 260-MIN | Seattle Mariners (MLB) |
| Jose Geraldo | 24 | P | 5-10 | 185 | R | R | 1999-12-03 | Azua,DR | A+ | | 2021-2025 | | Modesto Nuts (A) |
| Logan Gilbert | 27 | P | 6-6 | 215 | R | R | 1997-05-05 | Winter Park,FL | MLB | 2021-2025 | 2016-2025 | 2018- 1- 14-SEA | Seattle Mariners (MLB) |
| Isiah Gilliam | 27 | LF-RF | 6-1 | 220 | B | R | 1996-07-23 | Lilburn,GA | AAA | | 2015-2025 | 2015- 20- 603-NYA | Tacoma Rainiers (AAA) |
| Olivier Gomez | 22 | P | 6-1 | 145 | R | R | 2001-12-04 | Esperanza,DR | Rk | | 2019-2024 | 2019- UDFA -ANA | Dominican Mariners (Rk) |
| Carlos Gonzalez | 20 | C-1B | 5-11 | 175 | R | R | 2003-11-20 | Panama City,PN | Rk | | 2022-2025 | | ACL Mariners (Rk) |
| Junior Gonzalez | 24 | C | 5-8 | 186 | R | R | 2000-05-10 | San Francisco de Macoris,DR | A | | 2018-2024 | 2018- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Martin Gonzalez | 19 | SS | 5-10 | 165 | R | R | 2004-09-28 | Santo Domingo,DR | Rk | | 2022-2025 | 2022- UDFA -SEA | ACL Mariners (Rk) |
| Tyler Gough | 20 | P | 6-2 | 205 | B | R | 2003-08-12 | San Diego,CA | A | | 2023-2024 | 2022- 9- 276-SEA | Modesto Nuts (A) |
| Logan Gragg | 25 | P | 6-5 | 200 | R | R | 1998-08-08 | Prairie Grove,AR | AAA | | 2017-2024 | 2019- 8- 245-SLN | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) |
| Gabriel Guanchez | 17 | C | 6-2 | 196 | R | R | 2007-03-14 | Guarenas,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Anderson Guevara | 19 | P | 5-10 | 170 | R | R | 2004-11-04 | Las Mercedes,VZ | Rk | | 2022-2025 | | Dominican Mariners (Rk) |
| German Guilarte | 21 | C | 5-10 | 167 | R | R | 2003-03-06 | Barcelona,VZ | Rk | | 2021-2024 | 2019- UDFA -SEA | Dominican Mariners (Rk) |
| Jean C. Gutierrez | 18 | OF | 6-1 | 175 | R | R | 2005-10-25 | Puerto La Cruz,VZ | Rk | | 2023-2024 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Jake Haberer | 29 | P | 6-2 | 225 | R | R | 1995-02-09 | Maryville,IL | AAA | | 2014-2024 | 2018- UDFA -SEA | Arkansas Travelers (AA) ... ACL Mariners (Rk) |
| Sam Haggerty | 30 | LF-RF | 5-11 | 175 | B | R | 1994-05-26 | Phoenix,AZ | MLB | 2019-2025 | 2013-2025 | 2015- 24- 724-CLE | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Jesse Hahn | 34 | P | 6-5 | 205 | R | R | 1989-07-30 | Norwich,CT | MLB | 2014-2025 | 2008-2025 | 2010- 6- 191-TBA | Tacoma Rainiers (AAA) |
| Emerson Hancock | 25 | P | 6-4 | 213 | R | R | 1999-05-31 | Cairo,GA | MLB | 2023-2025 | 2018-2025 | 2020- 1- 6-SEA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Mitch Haniger | 33 | RF-DH | 6-2 | 214 | R | R | 1990-12-23 | Mountain View,CA | MLB | 2016-2024 | 2010-2024 | 2012- 1- 38-MIL | Seattle Mariners (MLB) |
| Ryan Hawks | 23 | P | 6-2 | 235 | R | R | 2000-11-24 | Bowling Green,KY | A+ | | 2020-2025 | 2023- 8- 247-SEA | Everett AquaSox (A+) |
| Heath Hembree | 35 | P | 6-4 | 220 | R | R | 1989-01-13 | Spartanburg,SC | MLB | 2013-2023 | 2008-2024 | 2010- 5- 168-SFN | Tacoma Rainiers (AAA) ... Everett AquaSox (A+) ... ACL Mariners (Rk) |
| Jonathan Hernandez | 27 | P | 6-3 | 190 | R | R | 1996-07-06 | Memphis,TN | MLB | 2019-2024 | 2013-2025 | 2013- UDFA -TEX | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Joseph Hernandez | 24 | P | 5-11 | 150 | R | R | 2000-06-15 | Cotui,DR | AA | | 2018-2024 | 2017- UDFA -SEA | Everett AquaSox (A+) |
| Kyle Hill | 27 | P | 5-11 | 200 | R | R | 1997-05-12 | Gonzales,LA | AAA | | 2016-2024 | 2019- 10- 306-SEA | Arkansas Travelers (AA) |
| Jordan Holloway | 28 | P | 6-6 | 230 | R | R | 1996-06-13 | Arvada,CO | MLB | 2020-2022 | 2014-2025 | 2014- 20- 587-MIA | Tacoma Rainiers (AAA) |
| Josh Hood | 23 | 2B-3B | 6-1 | 200 | R | R | 2000-07-21 | Vineland,NJ | AA | | 2019-2025 | 2022- 6- 186-SEA | Everett AquaSox (A+) |
| Brody Hopkins | 22 | P-OF | 6-4 | 200 | R | R | 2002-01-18 | Summerville,SC | AA | | 2021-2025 | 2023- 6- 187-SEA | Modesto Nuts (A) |
| Blake Hunt | 25 | C | 6-4 | 215 | R | R | 1998-11-10 | Costa Mesa,CA | AAA | | 2017-2025 | 2017- 2- 69-SDN | Tacoma Rainiers (AAA) |
| Ashton Izzi | 20 | P | 6-3 | 165 | R | R | 2003-11-18 | Omaha,NE | A+ | | 2023-2025 | 2022- 4- 126-SEA | Modesto Nuts (A) |
| Jordan Jackson | 25 | P | 6-6 | 204 | R | R | 1998-10-14 | McDonough,GA | A+ | | 2018-2025 | 2021- 10- 294-SEA | ACL Mariners (Rk) |
| Carlos Jaspe | 17 | P | 6-1 | 155 | R | R | 2007-06-05 | Caracas,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Chris Jefferson | 27 | P | 6-2 | 205 | L | R | 1997-01-24 | Pearland,TX | AAA | | 2017-2025 | 2021- UDFA -SEA | Tacoma Rainiers (AAA) ... Everett AquaSox (A+) |
| Anderson Jimenez | 16 | P | 6-0 | 160 | R | R | 2007-08-03 | Fantino,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Carlos Jimenez | 21 | LF-CF | 5-10 | 170 | L | L | 2003-02-14 | Los Alcarrizos,DR | A | | 2021-2025 | 2019- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Federik Jimenez | 19 | P | 6-0 | 175 | R | R | 2004-07-27 | Higuey,DR | Rk | | 2022-2024 | | Dominican Mariners (Rk) |
| Juan Jimenez | 17 | P | 6-1 | 225 | R | R | 2006-12-09 | Panama City,PN | Rk | | 2024-2024 | | Dominican Mariners (Rk) |
| Yoryi Jimenez | 20 | P | 6-1 | 175 | R | R | 2003-10-28 | Salcedo,DR | Rk | | 2021-2024 | | Dominican Mariners (Rk) |
| Carson Jones | 23 | P | 6-2 | 190 | L | L | 2000-09-29 | Glen Allen,VA | A+ | | 2020-2025 | 2023- 15- 457-SEA | Modesto Nuts (A) |
| Dawel Joseph | 17 | SS | 6-2 | 185 | R | R | 2007-05-15 | La Romana,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Jimmy Joyce | 25 | P | 6-2 | 210 | R | R | 1999-01-13 | Rockville Centre,NY | AA | | 2018-2025 | 2021- 16- 474-SEA | Arkansas Travelers (AA) ... ACL Mariners (Rk) |
| Rob Kaminsky | 29 | P | 6-0 | 195 | R | L | 1994-09-02 | Englewood Cliffs,NJ | MLB | 2020-2020 | 2013-2025 | 2013- 1- 28-SLN | Tacoma Rainiers (AAA) |
| Kobe Kato | 25 | 2B-LF | 5-11 | 170 | L | R | 1999-03-19 | Honolulu,HI | AAA | | 2019-2025 | 2021- 13- 388-HOU | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) ... ACL Mariners (Rk) |
| Trevor Kelley | 31 | P | 6-2 | 210 | R | R | 1992-10-20 | Providence,RI | MLB | 2019-2023 | 2012-2025 | 2015- 36-1071-BOS | Tacoma Rainiers (AAA) |
| Dallas Keuchel | 36 | P | 6-2 | 205 | L | L | 1988-01-01 | Tulsa,OK | MLB | 2012-2024 | 2007-2025 | 2009- 7- 221-HOU | Tacoma Rainiers (AAA) |
| Jimmy Kingsbury | 25 | P | 6-1 | 190 | R | R | 1999-02-13 | Philadelphia,PA | AA | | 2018-2025 | 2021- 17- 504-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| George Kirby | 26 | P | 6-4 | 215 | R | R | 1998-02-04 | Rye,NY | MLB | 2022-2025 | 2017-2025 | 2019- 1- 20-SEA | Seattle Mariners (MLB) |
| Austin Kitchen | 27 | P | 6-0 | 200 | L | L | 1997-02-11 | Pittsburgh,PA | MLB | 2024-2024 | 2016-2025 | 2021- UDFA -COL | Tacoma Rainiers (AAA) |
| Bill Knight | 24 | CF-LF | 5-11 | 195 | R | R | 1999-08-24 | Augusta,GA | AA | | 2019-2025 | 2022- 10- 306-SEA | Everett AquaSox (A+) |
| Joey Krehbiel | 31 | P | 6-3 | 250 | R | R | 1992-12-20 | Seminole,FL | MLB | 2018-2023 | 2011-2025 | 2011- 12- 375-ANA | Tacoma Rainiers (AAA) |
| Travis Kuhn | 26 | P | 5-10 | 195 | R | R | 1998-05-20 | Laguna Hills,CA | AAA | | 2018-2025 | 2019- 19- 576-SEA | Arkansas Travelers (AA) |
| Victor Labrada | 24 | CF-LF | 5-8 | 195 | L | L | 2000-01-16 | Havana,CU | AAA | | 2021-2025 | 2021- UDFA -SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Erick Lanza | 17 | P | 6-2 | 169 | R | R | 2006-09-01 | Cumana,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Casey Lawrence | 36 | P | 6-0 | 180 | R | R | 1987-10-28 | McSherrystown,PA | MLB | 2017-2025 | 2010-2025 | 2010- UDFA -TOR | Tacoma Rainiers (AAA) |
| Holden Laws | 24 | P | 6-2 | 205 | L | L | 1999-12-08 | Durham,NC | AA | | 2018-2024 | 2018- 16- 478-SEA | Everett AquaSox (A+) |
| Pedro Da Costa Lemos | 21 | P | 6-0 | 179 | R | R | 2003-05-22 | Santo Andre,BR | A+ | | 2021-2025 | 2019- UDFA -SEA | Modesto Nuts (A) |
| Michael Limoncelli | 24 | P | 6-2 | 185 | L | R | 2000-05-30 | Elmira,NY | A+ | | 2021-2025 | 2019- 6- 186-SEA | Modesto Nuts (A) |
| Mauricio Llovera | 28 | P | 5-11 | 224 | R | R | 1996-04-17 | El Tigre,VZ | MLB | 2020-2023 | 2016-2025 | 2015- UDFA -PHI | Tacoma Rainiers (AAA) ... ACL Mariners (Rk) |
| Tyler Locklear | 23 | 1B | 6-2 | 210 | R | R | 2000-11-24 | Baltimore,MD | MLB | 2024-2025 | 2020-2025 | 2022- 2- 58-SEA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) |
| Trevor Long | 23 | P | 6-1 | 197 | R | R | 2001-05-22 | Scottsdale,AZ | A | | 2021-2025 | | Modesto Nuts (A) |
| Aneury Lora | 20 | P | 6-2 | 155 | R | R | 2004-03-30 | Santiago,DR | A | | 2022-2025 | | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Michael Mariot | 35 | P | 6-0 | 190 | R | R | 1988-10-20 | West Hills,CA | MLB | 2014-2023 | 2008-2025 | 2010- 8- 239-KCA | Tacoma Rainiers (AAA) |
| Cade Marlowe | 27 | RF-CF | 5-11 | 210 | L | R | 1997-06-24 | Tifton,GA | MLB | 2023-2024 | 2016-2025 | 2019- 20- 606-SEA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Bernie Martinez | 27 | P | 6-0 | 195 | R | R | 1996-12-24 | Laredo,TX | AAA | | 2016-2024 | 2019- UDFA -SEA | Tacoma Rainiers (AAA) |
| Jeter Martinez | 18 | P | 6-4 | 180 | R | R | 2006-02-06 | Durango,MX | A | | 2023-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| Morgan McCullough | 26 | 3B-SS | 5-8 | 180 | L | R | 1997-12-19 | Seattle,WA | AAA | | 2017-2024 | 2019- 22- 661-ANA | Arkansas Travelers (AA) |
| Teddy McGraw | 22 | P | 6-3 | 210 | R | R | 2001-10-30 | Cooperstown,NY | A+ | | 2021-2025 | 2023- 3- 92-SEA | Modesto Nuts (A) |
| Jacob McNairy | 24 | P | 6-2 | 205 | R | R | 1999-11-22 | Decatur,AL | A | | 2019-2024 | 2022- 16- 486-SEA | Modesto Nuts (A) |
| Abdiel Medina | 22 | P | 5-11 | 155 | R | R | 2002-01-20 | Aguadulce,PN | Rk | | 2019-2024 | 2018- UDFA -SEA | ACL Mariners (Rk) |
| Harold Melenge | 22 | P | 5-10 | 170 | L | L | 2002-01-15 | Cali,CB | A+ | | 2019-2025 | 2018- UDFA -SEA | Everett AquaSox (A+) ... ACL Mariners (Rk) |
| Bryant Mendez | 20 | 1B-CF | 5-7 | 165 | R | R | 2003-09-15 | Barquisimeto,VZ | Rk | | 2021-2025 | | ACL Mariners (Rk) |
| Juan Mercedes | 24 | P | 6-2 | 219 | R | R | 2000-04-03 | Villa Tapia,DR | AAA | | 2017-2025 | 2017- UDFA -SEA | Arkansas Travelers (AA) |
| Danery Meyer | 17 | P | 6-4 | 202 | R | R | 2006-09-08 | Willemstad,CC | Rk | | 2024-2025 | | Dominican Mariners (Rk) |
| Kendal Meza | 18 | P | 6-0 | 160 | R | R | 2005-12-13 | Granada,NI | Rk | | 2023-2025 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Andrew Miller | 26 | C-RF | 6-3 | 230 | R | R | 1997-09-02 | Frisco,TX | AAA | | 2017-2025 | 2022- UDFA -SEA | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Bryce Miller | 25 | P | 6-2 | 200 | R | R | 1998-08-23 | Mount Pleasant,TX | MLB | 2023-2025 | 2018-2025 | 2021- 4- 113-SEA | Seattle Mariners (MLB) |
| Tyson Miller | 28 | P | 6-5 | 220 | R | R | 1995-07-29 | Fairfield,CA | MLB | 2020-2024 | 2014-2025 | 2016- 4- 134-CHN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Gabriel Moncada | 22 | 1B | 6-2 | 215 | L | L | 2001-12-17 | Caracas,VZ | A+ | | 2019-2025 | 2018- UDFA -SEA | Everett AquaSox (A+) |
| Lazaro Montes | 19 | RF | 6-5 | 210 | L | R | 2004-10-22 | Havana,CU | AA | | 2022-2025 | 2022- UDFA -SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Brock Moore | 24 | P | 6-6 | 230 | R | R | 2000-05-17 | Indianapolis,IN | A+ | | 2020-2025 | 2024- 7- 213-SEA | Modesto Nuts (A) |
| Dylan Moore | 31 | 2B-LF | 6-0 | 205 | R | R | 1992-08-02 | Yorba Linda,CA | MLB | 2019-2025 | 2012-2025 | 2015- 7- 198-TEX | Seattle Mariners (MLB) |
| Michael Morales | 21 | P | 6-2 | 205 | R | R | 2002-08-13 | Enola,PA | AA | | 2021-2025 | 2021- 3- 83-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Reid Morgan | 27 | P | 6-0 | 187 | R | R | 1997-03-24 | Texarkana,TX | AAA | | 2017-2024 | 2019- 13- 396-SEA | Arkansas Travelers (AA) |
| David Morillo | 22 | P | 6-2 | 168 | R | R | 2001-09-26 | Maracaibo,VZ | Rk | | 2019-2024 | 2018- UDFA -SEA | ACL Mariners (Rk) |
| Andres Munoz | 25 | P | 6-2 | 222 | R | R | 1999-01-16 | Los Mochis,MX | MLB | 2019-2025 | 2016-2025 | 2015- UDFA -SDN | Seattle Mariners (MLB) |
| Jean Munoz | 21 | P | 6-1 | 155 | R | R | 2002-09-17 | Pimentel,DR | A | | 2021-2025 | 2019- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Ruddy Navarro | 17 | P | 6-1 | 155 | R | R | 2006-07-21 | Santo Domingo,DR | Rk | | 2023-2024 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Zeus Nunez | 17 | 3B | 6-1 | 185 | R | R | 2006-11-20 | Santo Domingo,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Jared Oliva | 28 | CF-LF | 6-2 | 203 | R | R | 1995-11-27 | Santa Clarita,CA | MLB | 2020-2021 | 2015-2025 | 2017- 7- 208-PIT | Arkansas Travelers (AA) |
| Ben Onyshko | 27 | P | 6-2 | 205 | R | L | 1996-10-18 | Winnipeg,MB | AAA | | 2015-2025 | 2018- 24- 718-SEA | Arkansas Travelers (AA) |
| Eliezer Orbe | 18 | P | 6-0 | 165 | L | L | 2005-11-07 | Puerto Plata,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Anyelo Ovando | 23 | P | 6-5 | 222 | R | R | 2000-12-25 | San Pedro de Macoris,DR | A+ | | 2021-2025 | | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Spencer Packard | 26 | LF-1B | 5-11 | 210 | L | R | 1997-10-12 | Tucson,AZ | AAA | | 2017-2025 | 2021- 9- 264-SEA | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) |
| Charlie Pagliarini | 23 | 3B | 6-2 | 210 | L | R | 2000-12-12 | Trumbull,CT | A+ | | 2020-2025 | 2023- 19- 577-SEA | Modesto Nuts (A) |
| Michael Papierski | 28 | 1B-C | 6-3 | 224 | B | R | 1996-02-26 | Palos Heights,IL | MLB | 2022-2022 | 2015-2024 | 2017- 9- 271-HOU | Tacoma Rainiers (AAA) |
| Nick Payero | 24 | P | 6-1 | 215 | R | R | 2000-06-21 | Queens,NY | AAA | | 2019-2025 | 2023- UDFA -CIN | Tacoma Rainiers (AAA) ... Everett AquaSox (A+) |
| Francisco Pazos | 18 | P | 5-9 | 200 | R | R | 2005-11-16 | Los Mochis,MX | Rk | | 2023-2025 | | ACL Mariners (Rk) |
| Shaddon Peavyhouse | 25 | P | 6-3 | 215 | R | R | 1998-08-18 | Johnson City,TN | A+ | | 2018-2025 | 2023- UDFA -SEA | Everett AquaSox (A+) |
| Tai Peete | 18 | SS | 6-2 | 193 | L | R | 2005-08-11 | Riverdale,GA | A+ | | 2023-2025 | 2023- 1- 30-SEA | Modesto Nuts (A) |
| Sammy Peralta | 26 | P | 6-2 | 215 | L | L | 1998-05-10 | Queens,NY | MLB | 2023-2025 | 2017-2025 | 2019- 18- 530-CHA | Tacoma Rainiers (AAA) |
| Brayan Perez | 23 | P | 6-0 | 170 | L | L | 2000-09-05 | Valencia,VZ | AAA | | 2018-2025 | 2017- UDFA -SEA | Modesto Nuts (A) |
| Marcelo Perez | 24 | P | 5-10 | 195 | R | R | 1999-11-16 | Laredo,TX | AA | | 2019-2025 | 2022- 11- 336-SEA | Everett AquaSox (A+) |
| Michael Perez | 31 | C | 5-10 | 195 | L | R | 1992-08-07 | Bayamon,PR | MLB | 2018-2023 | 2011-2025 | 2011- 5- 154-ARI | Tacoma Rainiers (AAA) |
| Milkar Perez | 22 | 3B | 5-11 | 200 | B | R | 2001-10-16 | Leon,NI | A+ | | 2019-2025 | 2018- UDFA -SEA | Modesto Nuts (A) |
| Roberto Perez | 20 | P | 5-9 | 145 | R | R | 2004-01-21 | Sincejelo,CB | A | | 2024-2025 | | Dominican Mariners (Rk) |
| Juan Pinto | 19 | P | 6-2 | 165 | L | L | 2004-08-26 | Bejuma,VZ | Rk | | 2022-2024 | 2021- UDFA -SEA | ACL Mariners (Rk) |
| Jorge Polanco | 30 | 2B | 6-0 | 208 | B | R | 1993-07-05 | San Pedro De Macoris,DR | MLB | 2014-2025 | 2010-2025 | 2009- UDFA -MIN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) ... Everett AquaSox (A+) |
| Kaden Polcovich | 25 | 2B | 5-8 | 185 | B | R | 1999-02-21 | Edmond,OK | AA | | 2018-2024 | 2020- 3- 78-SEA | Arkansas Travelers (AA) |
| Eduardo Ponce | 17 | C | 5-9 | 172 | R | R | 2006-09-02 | Veracruz,MX | Rk | | 2024-2025 | | Dominican Mariners (Rk) |
| Bryan Pope | 25 | P | 6-2 | 215 | R | R | 1999-01-27 | Mission Viejo,CA | AA | | 2018-2024 | 2021- UDFA -SLN | Everett AquaSox (A+) |
| Sean Poppen | 30 | P | 6-3 | 210 | R | R | 1994-03-15 | Virginia Beach,VA | MLB | 2019-2022 | 2013-2025 | 2016- 19- 573-MIN | Tacoma Rainiers (AAA) |
| Connor Prins | 20 | P | 6-2 | 160 | R | R | 2003-10-04 | Haarlemmermeer,NT | Rk | | 2023-2024 | | ACL Mariners (Rk) |
| Adrian Quintana | 21 | P | 6-0 | 175 | R | R | 2002-11-20 | Puerto Plata,DR | A+ | | 2021-2025 | 2019- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Stefan Raeth | 23 | P | 6-1 | 195 | L | R | 2000-08-31 | Lafayette,CA | AA | | 2019-2025 | 2022- 17- 516-SEA | Everett AquaSox (A+) |
| Cal Raleigh | 27 | C | 6-2 | 235 | B | R | 1996-11-26 | Cullowhee,NC | MLB | 2021-2025 | 2016-2025 | 2018- 3- 90-SEA | Seattle Mariners (MLB) |
| Luke Raley | 29 | LF-1B | 6-3 | 235 | L | R | 1994-09-19 | Hinckley,OH | MLB | 2021-2025 | 2016-2025 | 2016- 7- 221-LAN | Seattle Mariners (MLB) |
| Blake Rambusch | 24 | 2B-LF | 5-9 | 175 | R | R | 1999-08-31 | Austin,TX | AA | | 2019-2025 | 2022- 15- 456-SEA | Arkansas Travelers (AA) ... ACL Mariners (Rk) |
| Ben Ramirez | 25 | 3B | 6-2 | 200 | L | R | 1998-12-02 | Chula Vista,CA | AAA | | 2018-2025 | 2021- 13- 384-SEA | Arkansas Travelers (AA) |
| Jheifer Ramirez | 17 | P | 6-0 | 155 | R | R | 2007-06-21 | Maracay,VZ | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Ruben Ramirez | 19 | P | 6-2 | 204 | R | R | 2005-02-06 | Santo Domingo,DR | Rk | | 2024-2025 | | Dominican Mariners (Rk) |
| Rangel Ravelo | 32 | 1B | 6-0 | 235 | R | R | 1992-04-24 | Havana,CU | MLB | 2019-2020 | 2010-2025 | 2010- 6- 188-CHA | ACL Mariners (Rk) |
| Will Riley | 22 | P | 6-0 | 200 | R | R | 2002-04-13 | Virginia Beach,VA | A | | 2022-2024 | 2024- 8- 243-SEA | Modesto Nuts (A) |
| Leo Rivas | 26 | SS | 5-8 | 150 | B | R | 1997-10-10 | Maracay,VZ | MLB | 2024-2025 | 2015-2025 | 2014- UDFA -ANA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Kay Robles | 19 | OF | 6-2 | 180 | R | R | 2005-03-09 | San Pedro de Macoris,DR | Rk | | 2023-2024 | 2023- UDFA -SEA | Dominican Mariners (Rk) |
| Victor Robles | 27 | CF | 6-0 | 193 | R | R | 1997-05-19 | Santo Domingo Este,DR | MLB | 2017-2025 | 2014-2025 | 2013- UDFA -WAS | Seattle Mariners (MLB) |
| Brock Rodden | 24 | 2B-3B | 5-7 | 170 | B | R | 2000-05-25 | Durant,OK | AA | | 2020-2025 | 2023- 5- 160-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Alberto Rodriguez | 23 | RF | 5-11 | 227 | L | L | 2000-10-06 | Cotui,DR | AA | | 2018-2025 | 2017- UDFA -TOR | Arkansas Travelers (AA) |
| Edryn Rodriguez | 21 | 2B-SS | 5-8 | 150 | R | R | 2003-04-23 | Santiago,DR | AA | | 2021-2024 | 2019- UDFA -SEA | Modesto Nuts (A) ... ACL Mariners (Rk) |
| Julio Rodriguez | 23 | CF | 6-3 | 228 | R | R | 2000-12-29 | Loma de Cabrera,DR | MLB | 2022-2025 | 2018-2025 | 2017- UDFA -SEA | Seattle Mariners (MLB) |
| Wuilliams Rodriguez | 20 | P | 6-4 | 195 | R | R | 2004-02-20 | Maracay,VZ | Rk | | 2022-2025 | | ACL Mariners (Rk) |
| Josh Rojas | 30 | 3B | 6-1 | 200 | L | R | 1994-06-30 | Litchfield Park,AZ | MLB | 2019-2025 | 2015-2025 | 2017- 26- 781-HOU | Seattle Mariners (MLB) |
| Jose Romero | 19 | P | 6-1 | 160 | R | R | 2004-07-26 | Barcelona,VZ | A | | 2023-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| Leandro Romero | 17 | 2B-SS | 6-1 | 170 | R | R | 2006-11-08 | Santiago,DR | Rk | | 2024-2025 | 2024- UDFA -SEA | Dominican Mariners (Rk) |
| Jason Ruffcorn | 25 | P | 6-2 | 225 | R | R | 1998-07-27 | Austin,TX | AAA | | 2017-2025 | 2021- 8- 235-PHI | Tacoma Rainiers (AAA) ... Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Allan Saathoff | 24 | P | 6-1 | 210 | R | R | 1999-09-18 | Easton,MD | AA | | 2018-2025 | 2023- UDFA -SEA | Everett AquaSox (A+) |
| Eduardo Salazar | 26 | p | 6-2 | 177 | R | R | 1998-05-05 | Cumana,VZ | MLB | 2023-2025 | 2017-2025 | 2017- UDFA -CIN | Tacoma Rainiers (AAA) |
| Axel Sanchez | 21 | SS-2B | 6-0 | 185 | R | R | 2002-12-10 | Navarette,DR | AA | | 2021-2025 | 2019- UDFA -SEA | Everett AquaSox (A+) |
| Lolo Sanchez | 25 | LF-RF | 5-11 | 186 | R | R | 1999-04-23 | Santo Domingo,DR | AA | | 2016-2024 | 2015- UDFA -PIT | Arkansas Travelers (AA) |
| Steven Sanchez | 20 | P | 6-0 | 160 | R | R | 2003-08-19 | Maracay,VZ | A+ | | 2021-2025 | 2019- UDFA -SEA | Everett AquaSox (A+) ... Modesto Nuts (A) ... ACL Mariners (Rk) |
| Gregory Santos | 24 | P | 6-2 | 190 | R | R | 1999-08-28 | San Cristobal,DR | MLB | 2021-2025 | 2016-2025 | 2015- UDFA -BOS | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) ... Everett AquaSox (A+) |
| Mathias Sato | 17 | P | 5-11 | 163 | L | R | 2007-01-28 | Atibaia,VZ | Rk | | 2024-2025 | | Dominican Mariners (Rk) |
| Tayler Saucedo | 31 | P | 6-4 | 205 | L | L | 1993-06-18 | Honolulu,HI | MLB | 2021-2025 | 2014-2025 | 2015- 21- 632-TOR | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Brandon Schaeffer | 24 | P | 6-2 | 195 | L | L | 2000-02-11 | Reading,PA | A+ | | 2019-2024 | 2022- 18- 546-SEA | ACL Mariners (Rk) |
| Matt Scheffler | 26 | C | 6-2 | 190 | R | R | 1998-02-06 | Kirkland,WA | AAA | | 2017-2025 | 2020- UDFA -SEA | Tacoma Rainiers (AAA) |
| Will Schomberg | 23 | P | 5-10 | 190 | R | R | 2001-01-30 | Winston-Salem,NC | AA | | 2020-2025 | | Everett AquaSox (A+) ... Modesto Nuts (A) |
| RJ Schreck | 23 | LF-RF | 6-1 | 205 | L | R | 2000-07-12 | Los Angeles,CA | AAA | | 2019-2025 | 2023- 9- 277-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Jacob Sharp | 22 | C | 5-10 | 180 | R | R | 2001-09-15 | Whittier,CA | AA | | 2021-2025 | 2023- 17- 517-SEA | Modesto Nuts (A) |
| Fernando Silvera | 21 | P | 5-11 | 190 | L | L | 2002-12-08 | | Rk | | 2023-2024 | | Dominican Mariners (Rk) |
| Jake Slaughter | 27 | 3B-2B | 6-1 | 200 | R | R | 1996-10-24 | West Monroe,LA | AAA | | 2017-2024 | 2018- 18- 548-CHN | Tacoma Rainiers (AAA) |
| Aidan Smith | 19 | CF-LF | 6-2 | 190 | R | R | 2004-07-23 | Tulsa,OK | A+ | | 2023-2025 | 2023- 4- 124-SEA | Modesto Nuts (A) |
| Kirby Snead | 29 | P | 6-1 | 218 | L | L | 1994-10-07 | Alachua,FL | MLB | 2021-2024 | 2014-2025 | 2016- 10- 312-TOR | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Collin Snider | 28 | P | 6-4 | 195 | R | R | 1995-10-10 | Nashville,TN | MLB | 2022-2025 | 2015-2025 | 2017- 12- 360-KCA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Nick Solak | 29 | LF-RF | 5-10 | 185 | R | R | 1995-01-11 | Woodridge,IL | MLB | 2019-2025 | 2014-2025 | 2016- 2- 62-NYA | Tacoma Rainiers (AAA) |
| Gabriel Sosa | 23 | P | 6-2 | 182 | R | R | 2001-04-17 | San Cristobal,DR | AAA | | 2019-2025 | 2019- UDFA -SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Gabe Speier | 29 | p | 5-11 | 200 | L | L | 1995-04-12 | Santa Barbara,CA | MLB | 2019-2025 | 2013-2025 | 2013- 19- 563-BOS | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) ... ACL Mariners (Rk) |
| Austin St. Laurent | 21 | 2B-SS | 6-0 | 190 | R | R | 2002-07-13 | Dover,NH | A | | 2022-2025 | 2024- 14- 423-SEA | Modesto Nuts (A) |
| Ryne Stanek | 32 | P | 6-4 | 226 | R | R | 1991-07-26 | St. Louis,MO | MLB | 2017-2025 | 2011-2025 | 2013- 1- 29-TBA | Seattle Mariners (MLB) |
| Levi Stoudt | 26 | p | 6-1 | 195 | R | R | 1997-12-04 | Pottstown,PA | MLB | 2023-2023 | 2017-2025 | 2019- 3- 97-SEA | Tacoma Rainiers (AAA) |
| Luis Suisbel | 21 | 3B-SS | 6-1 | 190 | B | R | 2003-05-23 | Valencia,VZ | A+ | | 2021-2025 | 2019- UDFA -SEA | Modesto Nuts (A) |
| Jared Sundstrom | 23 | RF-CF | 6-2 | 230 | R | R | 2001-06-21 | Santa Rosa,CA | AA | | 2021-2025 | 2023- 10- 307-SEA | Everett AquaSox (A+) |
| Matt Tabor | 25 | P | 6-2 | 180 | R | R | 1998-07-14 | Milton,MA | AAA | | 2017-2024 | 2017- 3- 82-ARI | Tacoma Rainiers (AAA) ... Everett AquaSox (A+) ... ACL Mariners (Rk) |
| Roiber Talavera | 20 | P | 6-0 | 160 | R | R | 2004-03-31 | San Felipe,VZ | Rk | | 2021-2025 | | ACL Mariners (Rk) |
| Yeury Tatiz | 23 | P | 6-3 | 175 | R | R | 2000-11-22 | Monte Cristi,DR | A | | 2018-2024 | 2017- UDFA -SEA | Modesto Nuts (A) |
| Samad Taylor | 25 | 2B-LF | 5-8 | 160 | R | R | 1998-07-11 | Corona,CA | MLB | 2023-2025 | 2016-2025 | 2016- 10- 302-CLE | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Troy Taylor | 22 | P | 6-0 | 205 | R | R | 2001-09-09 | Fontana,CA | MLB | 2024-2025 | 2020-2025 | 2022- 12- 366-SEA | Seattle Mariners (MLB) ... Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Robbie Tenerowicz | 29 | 1B | 6-1 | 228 | R | R | 1995-01-06 | San Carlos,CA | AAA | | 2014-2025 | 2016- 27- 810-TBA | Arkansas Travelers (AA) |
| Rhylan Thomas | 24 | RF-CF | 5-10 | 170 | L | L | 2000-04-15 | Ventura,CA | MLB | 2025-2025 | 2020-2025 | 2022- 11- 329-NYN | Tacoma Rainiers (AAA) |
| Trent Thornton | 30 | P | 6-0 | 190 | R | R | 1993-09-30 | Charlotte,NC | MLB | 2019-2025 | 2013-2025 | 2015- 5- 139-HOU | Seattle Mariners (MLB) |
| Anthony Tomczak | 23 | P | 6-2 | 200 | R | R | 2000-10-17 | Boca Raton,FL | A+ | | 2019-2024 | 2019- 15- 456-SEA | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Eduardo Tovar | 20 | P | 5-11 | 165 | R | R | 2003-10-10 | Araure,VZ | Rk | | 2022-2024 | 2022- UDFA -SEA | ACL Mariners (Rk) |
| Blake Townsend | 23 | P | 6-4 | 245 | L | L | 2001-04-05 | Traralgon,AU | AAA | | 2019-2025 | 2018- UDFA -SEA | Everett AquaSox (A+) |
| Evan Truitt | 21 | P | 6-0 | 187 | R | R | 2003-05-02 | Berlin,MD | A+ | | 2022-2025 | 2024- 12- 363-SEA | Modesto Nuts (A) |
| Justin Turner | 39 | DH-1B | 5-11 | 208 | R | R | 1984-11-23 | Long Beach,CA | MLB | 2009-2025 | 2003-2025 | 2006- 7- 204-CIN | Seattle Mariners (MLB) |
| Luis Urias | 27 | 2B-3B | 5-9 | 202 | R | R | 1997-06-03 | Magdalena de Kino,MX | MLB | 2018-2025 | 2014-2025 | 2013- UDFA -SDN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Reid VanScoter | 25 | P | 6-0 | 190 | L | L | 1998-11-25 | Rochester,NY | AA | | 2018-2025 | 2022- 5- 156-SEA | Arkansas Travelers (AA) |
| Carlos Vargas | 24 | p | 6-4 | 210 | R | R | 1999-10-13 | Moca,DR | MLB | 2023-2025 | 2018-2025 | 2016- UDFA -CLE | Tacoma Rainiers (AAA) |
| Terrin Vavra | 27 | 2B-SS | 5-11 | 185 | L | R | 1997-05-12 | Menomonie,WI | MLB | 2022-2025 | 2016-2025 | 2018- 3- 96-COL | Tacoma Rainiers (AAA) |
| Dervy Ventura | 20 | SS | 5-10 | 165 | B | R | 2004-01-20 | Pimentel,DR | A | | 2022-2025 | | ACL Mariners (Rk) |
| Jason Vosler | 30 | 1B-RF | 6-0 | 220 | L | R | 1993-09-06 | West Nyack,NY | MLB | 2021-2024 | 2012-2025 | 2014- 16- 469-CHN | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Austin Voth | 32 | P | 6-2 | 215 | R | R | 1992-06-26 | Redmond,WA | MLB | 2018-2024 | 2011-2025 | 2013- 5- 166-WAS | Seattle Mariners (MLB) |
| Jesse Wainscott | 24 | P | 6-1 | 200 | R | R | 2000-06-15 | Indianapolis,IN | A+ | | 2019-2025 | 2023- UDFA -SEA | Modesto Nuts (A) |
| Logan Warmoth | 28 | 3B-SS | 5-11 | 195 | R | R | 1995-09-06 | Orlando,FL | AAA | | 2015-2024 | 2017- 1- 22-TOR | Tacoma Rainiers (AAA) |
| Curtis Washington | 24 | CF-LF | 6-2 | 180 | R | R | 2000-05-22 | West Memphis,AR | AAA | | 2019-2025 | 2022- 19- 576-SEA | Tacoma Rainiers (AAA) ... Everett AquaSox (A+) ... Modesto Nuts (A) ... ACL Mariners (Rk) |
| Jack White | 24 | P | 6-3 | 210 | L | L | 1999-10-04 | Bethesda,MD | A | | 2019-2024 | 2024- UDFA -SEA | Modesto Nuts (A) |
| C.J. Widger | 25 | P | 6-6 | 170 | L | L | 1999-05-25 | Pennsville,NJ | A+ | | 2023-2025 | 2021- 10- 284-TEX | Everett AquaSox (A+) ... Modesto Nuts (A) |
| Ben Williamson | 23 | 3B | 6-0 | 210 | R | R | 2000-11-05 | Fairfax,VA | MLB | 2025-2025 | 2020-2025 | 2023- 2- 57-SEA | Arkansas Travelers (AA) ... Everett AquaSox (A+) |
| Dylan Wilson | 18 | P | 6-0 | 160 | R | R | 2005-12-01 | Willemstad,CC | Rk | | 2023-2025 | 2023- UDFA -SEA | ACL Mariners (Rk) |
| Hogan Windish | 25 | 1B-2B | 5-11 | 222 | R | R | 1999-05-10 | Pinehurst,NC | AA | | 2019-2025 | 2022- 7- 216-SEA | Arkansas Travelers (AA) |
| Danny Wirchansky | 26 | P | 6-1 | 200 | L | L | 1997-07-02 | Valhalla,NY | AA | | 2017-2025 | 2019- 25- 763-MIL | Arkansas Travelers (AA) |
| Grant Witherspoon | 27 | RF-CF | 6-1 | 200 | L | L | 1996-09-27 | Littleton,CO | AAA | | 2016-2024 | 2018- 4- 120-TBA | Arkansas Travelers (AA) |
| Bryan Woo | 24 | p | 6-2 | 205 | R | R | 2000-01-30 | Oakland,CA | MLB | 2023-2025 | 2019-2025 | 2021- 6- 174-SEA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) ... Everett AquaSox (A+) |
| Cole Young | 20 | SS-2B | 5-11 | 180 | L | R | 2003-07-29 | Pittsburgh,PA | MLB | 2025-2025 | 2022-2025 | 2022- 1- 21-SEA | Arkansas Travelers (AA) |
| Seby Zavala | 30 | C-1B | 5-11 | 205 | R | R | 1993-08-28 | Fort Hood,TX | MLB | 2019-2024 | 2012-2025 | 2015- 12- 352-CHA | Seattle Mariners (MLB) ... Tacoma Rainiers (AAA) |
| Jose Zerpa | 19 | P | 6-2 | 180 | R | R | 2004-10-19 | San Felipe,MX | A+ | | 2023-2025 | | ACL Mariners (Rk) |
| 277 record(s) |